One source told the paper that Mellon has already secured funding for a brand, without supplying details about its planned product range or launch timetable.
Another source said that following Labeluxs May 2011 takeover of Jimmy Choo, Mellon was eager to return to the entrepreneurial life. The £500m sale of the company saw Mellons position as Chief Creative Officer converted from an ownership stake to a salary.
On Monday, Labelux announced the departures of Mellon and Chief Execuitve Officer Joshua Shulman, who resigned over the weekend.
Its always a surprise when people resign, but you digest the news and then see how you can build a future, Labelux CEO Reinhard Mieck said in a weekend interview.
Mellon has refused to comment on her departure since it was announced. The Sunday Times estimates her fortune at £150m.